Time Traveller: The Girl who Leapt Through Time, despite what it says, is not actually based off the 2006 anime film under the same name. Both movies (anime and this one) as well as a few other movies, are based off a novel written under the same name. The original live action movie was aired in 1983. This movie is the sequel to that one. The anime adaptation is actually based off of a different protagonist (Akari's cousin) in a different universe where Makoto (the protagonist of the anime film) discovers time travel of her own. Just wanted to make that misunderstanding clear.